Merge branch 'hns-acpi'

Kejian Yan says:

====================
net: hns: add support of ACPI

This series adds HNS support of acpi. The routine will call some ACPI
helper functions, like acpi_dev_found() and acpi_evaluate_dsm(), which
are not included in other cases. In order to make system compile
successfully in other cases except ACPI, it needs to add relative stub
functions to linux/acpi.h. And we use device property functions instead
of serial helper functions to suport both DT and ACPI cases. And then
add the supports of ACPI for HNS.

change log:
 v3->v4:
  mii-id gets from dev-name instead of address

 v2->v3:
 1. add Review-by: Andy Shevchenko
 2. fix the potential memory leak

 v1 -> v2:
 1. use acpi_dev_found() instead of acpi_match_device_ids() to check if
it is a acpi node.
 2. use is_of_node() instead of IS_ENABLED() to check if it is a DT node.
 3. split the patch("add support of acpi for hns-mdio") into two patches:
    3.1 Move to use fwnode_handle
    3.2 Add ACPI
 4. add the patch which subject is dsaf misc operation method
 5. fix the comments by Andy Shevchenko
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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